Projecting machine



July 2s, 1931. A. SAPIER 1,816,234

PROJECTING MACHINE Filed June 29, 1929 s sheets-sheet 2 Miam/A Y July 28, 1931. A. SAPIER 1,816,234

PROJECTING MACHINE Filed June 29, 1929 3 Sheets-Sheet 5 Patented July 28, 1931 UNITED STATES PATENT OFFICE ABRAHAM SAPIER, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNIVERSAL STAMPING & MFG. CO., OF CHICAGO, ILLINOIS, A CORPORATION F ILLINOIS rRoJEc'rING MACHINE Application led .Tune 29,

The main objects of this invention are to provide an improved form of motion picture projecting machine; to provide al projector having an improved foim of casing for houslng various parts of the operating mechal nism; to provide an improved form of base for adjustably supporting the casing; to provide improved means for shifting said casing angularly relative to the base for adjusting the light field relative to the receiving screen; and to provide improved means for ventilating the casing to prevent overheating.

An illustrative embodiment of this invention is shown in the accompanying drawings, wherein :-v

Figure 1 is a side elevation of an improved projecting machine, With the film and reels illustrated in dotted outline.

Fig. 2 is a top plan of the same, partly broken away.

Fig. 3 is an end elevation taken from the left of Fig. 1.

Fig. 4 is a fragmentary side elevation of the machine, showing the casing tilted backwardly on the base for raising the light field; the dotted outline representing the casing in another position.

Fig. 5 is a vertical fragmentary section taken on the line 5 5 of Fig. 1.

Fig. 6 is a horizontal section, taken on the line 6-6 of Fig. 1.

Fig. 7 is a vertical section of the fan housing, taken on the line 7-7 of Fig. 5.

Motion picture projectors generally include an upright casing having a rear compartment for housing the usual lightbulb and a forward compartment in which is mounted a rotatable light interceptor arranged directly behind a light aperture in the lm guideway. Projectors are also generally equipped with a framing device for properly positioning each picture within the border of the light field. In addition to providing means, such as a framer for adjusting each picture relative to the light field, it is necessary to provide means for adjusting the light field relative to the receiving screen. This is usually accomplished by pivotally supporting the casing on a horizontal axis so as to permit it to be angularly adjusted.

1929. Serial No. 374,630.

In the construction herein shown, the projector comprises an improved form of base forming a bearing for rotatably supporting a casing which houses the usual light bulb and interceptor and also an electric motor which is arranged on an axis substantially coincident with the axis of rotation of the casing. Improved means is also provided for circulating air through the casing for dissipating the heat of the illuminating lamp.

The accompanying drawings show only as much of the entire projector as will be of assistance in apprehending the invention. Various parts of the machine, notl fully illustrated in these drawings, are described and claimed in the co-pending applications, Serial No. 369,126, tiled June 7, 1929; Serial No. 370,522, filed June 13, 1929; and Serial No. 372,867, iiled June 22, 1929.

In the construction illustrated, the improved projector comprises a base 1, on which is j ournaled a casing 2 forming a housing for an electric motor 3 and certain other parts, not shown.

The base 1 has a switch 4 and rheostat 5 for controlling the electric circuit and has the usual socket for a terminal plug 6. Formed on top of the base 1, is anannular bearing 7 for pivotally supporting the casing. A set screw 8 is mounted on the ends of the bearing so as to permit the casing to be firmlyclamped in any of its angularly adjusted positions. Formed inthe bottom of the bearing 7, is a slot 9, for accommodating conduits 10 connected to the motor and conduits 11 connected to a light bulb 12. A

'Io facilitate assembly of the machine, the casing 2 is formed in separate sections. The upper section of the casing includes a forward compartment 13, a lateral compartment 14 and a rear compartment 15. The forward compartment 13 houses a light interceptor, not shown, which is illustratedn said copending application, Serial No. 369,126. Also located in the compartment 13, is a main drive shaft having a clutch, not shown, which is connect-ed to the motor 3 by a belt 16. The clutch is described and claimed in said copending application, Serial No. 372,867.

Mounted on the casing 2, in front of the compartment 13, is a film guideway 17, a framer 13 and a lens mounting 19. f lhe film, illustrated at 20, is supported on reels 21, which are journaled on arms 22 and 23 supported on the forward part of the casing. ',ll he reels 21 are driven by belts 24 connected to sprockets 25 which are journaled on the casing. rlthese parts of the machine are more fully described in said co-pending applications, Serial Numbers 369,126, and 370,522.

The compartment 14 of the casing houses a train of gears, not shown, which operatively connects the drive shaft with the light interceptor and with the sprockets 25.

The compartment 15 houses the lamp 12 and is provided with a vented cover 26, which is detachably secured to the top of the casing by screws 27. A reflector mounting- 28 is threaded in the rear wall of the compartment 15.

ln the form shown, the lamp 12 is supported on a cup 29, which is secured to the upper section of the casing by bolts 30. The cup 29 has an inwardly extending channel shaped part 31, which forms an air passage providing communication between the lamp compartment 15 and the lower part of the casing.

lin the form shown, the lower part of the casing includes a hollow cylndrical journal 32, which forms a housing for the motor 3. The journal 32 is rotatably supported in the annular bearing 7 of the base on an axis which is substantially coincident with the axis of the motor. rlhe motor 3 has a shaft 33 provided at one end thereof with a pulley 34 connected to the belt 16 and at its other end with a Ventilating fan 35 adapted to draw air downwardly through the compartment 15.

The side of the journal 32 which is located adjacent the fan 35 is open and is provided with an upwardly extending channel 36 secured to the upper part of the casing by a screw 37. The channel 36 forms an air passage communicating with the compartment 15 through the lpassage 31. Extending across the open end of the journal 32, is a plate 38 having a central opening 39 through which the air from the passage 36 is withdrawn by the fan 35. Secured tothe outer fac-e of the plate 38, is a cup-shaped fan shield 40 having outlet apertures 4l.

ln the construction illustrated, the journal 32 projects through the bearing 7 so as to provide a cylindrical ledge for supporting an annular bracket 42, which is clamped to the journal by a screw 43. The bracket 42 has an upwardly extending arm 44 secured to the upper part of the casing by a screw 45. Journaled in the arm 44, is a pin 46 having a pinion 47 meshing with an arcuate rack 48 formed on the bearing 7 for angularly adjusting the cas- 1ng relative to the base. An operating knob 49 is secured to the outer end of the pin 46.

rllhe end of the ournal 32 which is located asiegaae adjacent the bracket 42 is closed by an end wall 50 to which the motor is secured by screws ing, not shown. During the operation of the motor, the fan 35 is driven for drawing air downwardly through the compartment 15, passages 31 and 36 and vents 41 so as to prevent overheating of the casing. l/V hen it is desired to adjust the light field vertically relative to the picture receiving screen, the casing 2 is shifted angularly in the bearing 7. A fine adjustment may be effected by turning the knob 49.

Although but one specific embodiment of this invention has been herein shown and described, it-will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

ll claim:

1. A projecting machine comprising a hollow base, an annular bearing on said base, a casing having a hollow cylindrical journal rotatably supported in said bearing to permit said casing to be adjusted angularly relative to said base, a source of illumination in said casing for projecting light from said casing, means for feeding a film across the path of light, a motor supported within said journal and having a shaft coincident with the axis of rotation of said casing, a pulley on said shaft, and an endless belt connected to said pulley for actuating said film feeding means.

2. A projecting machine comprising a hollow base, an'annular bearing on said base, a casing having a hollow' cylindrical journal rotatably supported in said bearing on a horizontal axis to permit said casing to be adjusted angularly relative to said base, said annular bearing and cylindrical journal forming a housing, a source of illumination in said casing for projecting light from said casing, means for feeding a film, a motor enclosed within said housing for actuating said feeding means, the axis of said motor being coincident with the axis of said journal, a passage providing communication between said housing and said hollow base, motor control means located within said base, and electric conduits exending through said passage for connecting said motor with said control means.

i 3. A projecting machine comprising a base, an annular bearing on said base, a casing having a hollow cylindrical journal rotatably supported in said bearing on a horizontal axis to permit said casing to be adjusted angularly relative to said base, a source of illumination in said casing for projectng CR Y light from said casing, meansfor feeding 1 zontal axis to permit saidcasing to be adj usted angularly relative tosaid base, a source of illumination in said casing for projectingllight from said casing, means forfe-eding a In, a motor supported within said journal, a shaft on said motor coincident with the axis of said journal, a pulley on said shaft, an endless belt connected to said pulley for actuating .said lm feeding means, an arcuate rack concentrically arranged on said bearing, a pinion journaled on said casing and engagingv saidl rack for angularly adjusting said casing, and a handle connected to said pinion and'projecting outwardly within said endless belt. v

5. A projecting machine comprising a base, an annular bearin on said base, a casing having a hollow cylindrical journal rotatably supported in saidbearing on a horizontal axis to permit said casing to be angularly adjusted, film, feeding means on said casing, a lamp compartment in said casing, a motor supported in said journal for actuating said feeding means, said casing having an air passage providing communication between said journal and said compartment and a fan mounted on said motor for causing a flow of air throuh said compartment.

6. projecting -machine comprising a base, an annular bearing on said base, a cas- Y V ing having a hollow cylindrical journal rotatably supported in said bearing on a horif zontal axis to permit said casing to be angularly adjusted, lilm feedingv means on said casing, a lamp compartment in said casing, said compartment having vents in the top thereof, a motor supported in said journal for actuating said feeding means, said caslng having an a1r passage providlng communication between said journal and said compartment,'and a fan mounted on said motor for causing a iow of air through said compartment. Y

`7. A projecting machine comprising a base,lan annular lbearing on said base, a casingV having a hollow cylindrical journal roing said feeding means, said casing having an air passage providing communication between said journal and said compartment, and a fan mounted on sai-d motor for causing a flow of air through said compartment, the axis of said fan being coincident with the axis ofisaid journal. i

Signed at Chicago this 26th day of June, 1929.

AisRAHAiM SAPIER.

tatably supported in said bearing on a horizontal axis to permit said casing to be angularly adjusted, film feeding means on sai-d caslng, a lamp compartment in `said casing, a

motor supported said journal for actuat- 

